64444110440 has 32 divisors (see below), whose sum is σ = 145016952480. Its totient is φ = 25774496832.

The previous prime is 64444110433. The next prime is 64444110473. The reversal of 64444110440 is 4401144446.

It is a junction number, because it is equal to n+sod(n) for n = 64444110397 and 64444110406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248447 + ... + 436593.

It is an arithmetic number, because the mean of its divisors is an integer number (4531779765).

Almost surely, 2^64444110440 is an apocalyptic number.

It is an amenable number.

64444110440 is an abundant number, since it is smaller than the sum of its proper divisors (80572842040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64444110440 is a wasteful number, since it uses less digits than its factorization.

64444110440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196721 (or 196717 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 64444110440 its reverse (4401144446), we get a palindrome (68845254886).

The spelling of 64444110440 in words is "sixty-four billion, four hundred forty-four million, one hundred ten thousand, four hundred forty".